Some APIs are unsound

[marysaka]

At the current time of writing, multiple APIs allows the user to pass (or receive) a pointer directly or indirectly (via a structure containing pointers).

Those APIs should at least been marked unsafe.

[sanpii]

Thank you for pointing there points.

I made a PR to fix that, but the snapshot list segfaults:

    Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[examples/snapshot.rs:5] c.snapshot_list() = [
    Snapshot {
        inner: 0x000055ccb4f98180,
        comment_pathname: Some(
            "/var/lib/lxc/apicontainer/snaps/snap4/comment",
        ),
        lxcpath: "/var/lib/lxc/apicontainer/snaps",
        name: "snap4",
        timestamp: "2021:10:13 07:59:15",
    },
    Snapshot {
        inner: 0x00007ffd4b9887b8,
        comment_pathname: None,
Erreur de segmentation